ALTA/LITTLE COTTONWOOD CANYON HRRR-DERIVED FORECAST GUIDANCE *************************************************************** * THIS IS AN EXPERIMENTAL, AUTOMATED, AND UNOFFICIAL FORECAST * *************************************************************** CREATED/MAINTAINED BY THE STEENBURGH GROUP DEPARTMENT OF ATMOSPHERIC SCIENCES UNIVERSITY OF UTAH Contact: jim.steenburgh@utah.edu WETBULBZERO, 1H QPF, ACCUM QPF DIRECTLY FROM HRRR COLLINS SNOW RATIO/H2O, MT BALDY T/RH, MT BALDY WIND, 1H SNOW, and ACCUM SNOW based on machine learning including UU RF SLR algorithm Based on 18Z 02-Oct-2025 intialized HRRR FORECAST HOURS 0-48 FHR VALID MOUNTAIN TIME COLLINS T MT BALDY T/RH MT BALDY WIND WETBULBZERO SLR/H2O 1H QPF / 1H SNOW / ACCUM QPF / ACCUM SNOW 0 12 PM Thu Oct 02 2025 52F 44F / 38% SSE 13 G 30 MPH 11600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 1 01 PM Thu Oct 02 2025 53F 45F / 45% S 11 G 26 MPH 11500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 2 02 PM Thu Oct 02 2025 55F 46F / 38% SSE 11 G 29 MPH 11600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 3 03 PM Thu Oct 02 2025 55F 46F / 37% S 12 G 30 MPH 11500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 4 04 PM Thu Oct 02 2025 54F 47F / 34% S 12 G 28 MPH 11600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 5 05 PM Thu Oct 02 2025 54F 48F / 27% S 14 G 30 MPH 11600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 6 06 PM Thu Oct 02 2025 52F 48F / 25% S 13 G 28 MPH 11600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 7 07 PM Thu Oct 02 2025 49F 45F / 27% SSE 13 G 27 MPH 11500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 8 08 PM Thu Oct 02 2025 47F 44F / 30% SSE 15 G 30 MPH 11700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 9 09 PM Thu Oct 02 2025 46F 43F / 40% SSE 14 G 31 MPH 11700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 10 10 PM Thu Oct 02 2025 45F 43F / 36% S 15 G 28 MPH 11900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 11 11 PM Thu Oct 02 2025 46F 42F / 42% S 17 G 34 MPH 12000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 12 12 AM Fri Oct 03 2025 45F 42F / 42% SSE 16 G 35 MPH 12200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 13 01 AM Fri Oct 03 2025 44F 41F / 47% S 18 G 37 MPH 12800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 14 02 AM Fri Oct 03 2025 44F 41F / 51% SSE 18 G 36 MPH 12800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 15 03 AM Fri Oct 03 2025 44F 40F / 56% S 18 G 38 MPH 12300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 16 04 AM Fri Oct 03 2025 44F 40F / 62% S 19 G 42 MPH 12400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 17 05 AM Fri Oct 03 2025 44F 40F / 69% S 21 G 43 MPH 12400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 18 06 AM Fri Oct 03 2025 44F 40F / 71% S 22 G 48 MPH 12200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 19 07 AM Fri Oct 03 2025 43F 39F / 75% S 22 G 47 MPH 12000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 20 08 AM Fri Oct 03 2025 43F 39F / 78% S 22 G 45 MPH 11700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 21 09 AM Fri Oct 03 2025 44F 39F / 80% S 21 G 44 MPH 11300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 22 10 AM Fri Oct 03 2025 46F 39F / 74% S 18 G 41 MPH 11200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 23 11 AM Fri Oct 03 2025 48F 40F / 64% S 18 G 42 MPH 11600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 24 12 PM Fri Oct 03 2025 50F 41F / 60% S 17 G 44 MPH 11900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 25 01 PM Fri Oct 03 2025 51F 42F / 54% S 19 G 44 MPH 12000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 26 02 PM Fri Oct 03 2025 52F 42F / 47% S 16 G 41 MPH 11900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 27 03 PM Fri Oct 03 2025 51F 42F / 54% S 15 G 35 MPH 12000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 28 04 PM Fri Oct 03 2025 50F 41F / 64% SSW 16 G 37 MPH 12000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 29 05 PM Fri Oct 03 2025 49F 41F / 69% SSW 14 G 34 MPH 11400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 30 06 PM Fri Oct 03 2025 44F 38F / 85% S 14 G 30 MPH 11100 FT 0:1 / -% 0.03" / 0.0" 0.03" / 0.0" 31 07 PM Fri Oct 03 2025 43F 38F / 83% SSW 13 G 26 MPH 11000 FT 0:1 / -% 0.01" / 0.0" 0.04" / 0.0" 32 08 PM Fri Oct 03 2025 42F 37F / 73% SW 16 G 32 MPH 10600 FT 0:1 / -% 0.01" / 0.0" 0.05" / 0.0" 33 09 PM Fri Oct 03 2025 41F 36F / 51% SSW 17 G 38 MPH 10600 FT 0:1 / -% 0.01" / 0.0" 0.06" / 0.0" 34 10 PM Fri Oct 03 2025 40F 35F / 63% SW 13 G 30 MPH 10900 FT 0:1 / -% 0.00" / 0.0" 0.06" / 0.0" 35 11 PM Fri Oct 03 2025 39F 34F / 81% SW 13 G 22 MPH 10900 FT 0:1 / -% 0.00" / 0.0" 0.06" / 0.0" 36 12 AM Sat Oct 04 2025 39F 33F / 74% SSW 14 G 29 MPH 10800 FT 0:1 / -% 0.00" / 0.0" 0.06" / 0.0" 37 01 AM Sat Oct 04 2025 40F 36F / 66% SSW 16 G 32 MPH 10600 FT 0:1 / -% 0.00" / 0.0" 0.06" / 0.0" 38 02 AM Sat Oct 04 2025 39F 35F / 71% S 14 G 24 MPH 10700 FT 0:1 / -% 0.00" / 0.0" 0.06" / 0.0" 39 03 AM Sat Oct 04 2025 39F 34F / 75% SSE 11 G 24 MPH 10500 FT 0:1 / -% 0.00" / 0.0" 0.06" / 0.0" 40 04 AM Sat Oct 04 2025 39F 34F / 85% SE 12 G 25 MPH 10500 FT 0:1 / -% 0.00" / 0.0" 0.06" / 0.0" 41 05 AM Sat Oct 04 2025 37F 31F / 100% SE 12 G 31 MPH 9600 FT 7:1 / 14% 0.01" / 0.1" 0.07" / 0.1" 42 06 AM Sat Oct 04 2025 33F 28F / 99% SSW 11 G 26 MPH 9500 FT 9:1 / 11% 0.13" / 1.2" 0.20" / 1.3" 43 07 AM Sat Oct 04 2025 33F 28F / 97% S 16 G 31 MPH 9300 FT 6:1 / 17% 0.02" / 0.1" 0.22" / 1.4" 44 08 AM Sat Oct 04 2025 32F 27F / 95% SW 13 G 26 MPH 8500 FT 7:1 / 14% 0.00" / 0.0" 0.22" / 1.4" 45 09 AM Sat Oct 04 2025 29F 24F / 88% WSW 15 G 26 MPH 8600 FT 8:1 / 12% 0.06" / 0.5" 0.28" / 1.9" 46 10 AM Sat Oct 04 2025 30F 25F / 91% W 12 G 23 MPH 8500 FT 9:1 / 11% 0.06" / 0.5" 0.34" / 2.4" 47 11 AM Sat Oct 04 2025 32F 25F / 87% W 14 G 25 MPH 9000 FT 8:1 / 12% 0.02" / 0.2" 0.36" / 2.6" 48 12 PM Sat Oct 04 2025 34F 27F / 97% W 14 G 27 MPH 9000 FT 8:1 / 12% 0.02" / 0.2" 0.38" / 2.8"